Реакция #1121741

Уравнение реакции

ethylene oxide

bisphenol A

propylene oxide

bisphenol A

terephthalic acid

adipic acid

dibutyltin oxide

→

polyester

Styrene-Acrylic Acid

Условия реакции

Обработка

1. 1
   ДругоеIn a reaction vessel equipped with a condenser, a stirrer and a nitrogen inlet tube
2. 2
   ДругоеThe mixture was subjected to a reaction for 8 hours at 230° C. under normal pressure
3. 3
   Другоеsubsequently reacted for 5 hours under a reduced pressure of from 10 mmHg to 15 mmHg
4. 4
   Другоеthe mixture was reacted for 2 hours at 180° C. under normal pressure

Методика

In a reaction vessel equipped with a condenser, a stirrer and a nitrogen inlet tube, 229 parts of ethylene oxide 2 mol adduct of bisphenol A, 529 parts of propylene oxide 3 mol adduct of bisphenol A, 208 parts of terephthalic acid, 46 parts of adipic acid, and 2 parts of dibutyltin oxide were added. The mixture was subjected to a reaction for 8 hours at 230° C. under normal pressure, and subsequently reacted for 5 hours under a reduced pressure of from 10 mmHg to 15 mmHg. Further, 44 parts of trimellitic anhydride were added thereto, and the mixture was reacted for 2 hours at 180° C. under normal pressure. Thus a [low-molecular weight polyester 1] was obtained. The [low-molecular weight polyester 1] was found to have a number average molecular weight of 2,500, a mass average molecular weight of 6,700, a glass transition temperature (Tg) of 43° C., an acid value of 25 mgKOH/g and an SP value of 10.8.

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